GRB 210413B: Swift observation summary

Mission:	Swift/BAT
GRB RA:	182.558°
GRB Dec:	+55.965°
GRB Err:	4.0 arcmin
T0:	2021-04-13 23:46:52 UT
Galactic:	134.56° +60.22°
Galactic N_H:	1.00× 10²⁰ cm^-2
Galactic E(B-V):	0.01178436

Sun distance:	112.57°
Sun angle:	10.67 [hr] (East of Sun)
Moon distance:	102.17°
Visibility of this field.

Data analysed so far:

ObsID: 00021428001 with 5.0 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 4 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes
1 [details]	12h 10m 07.98s182.53327°	+56° 02′ 59.0″56.04973°	5.7′′	Reasonable	5.2′	9.2 ks
Mean XRT rate: 3.4 (+0.9, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 4.3 (±1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.09 (+0.28, -0.26) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.4 (±0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.2 [What is this?]
2 [details]	12h 10m 45.74s182.69056°	+56° 04′ 17.4″56.07151°	7.9′′	Poor	7.8′	6.6 ks
Mean XRT rate: 2.0 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 2.0 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.8 [What is this?]
3 [details]	12h 09m 02.19s182.25912°	+56° 01′ 53.5″56.03153°	5.3′′	Good	10.8′	4.3 ks	Matches SIMBAD source: V* TY UMa, 2.6″ away.
Mean XRT rate: 4.9 (+1.6, -1.3) ×10^-3 ct s^-1 Peak XRT rate: 4.9 (+1.6, -1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.7 (+2.4, -2.0) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 7.7 (+2.4, -2.0) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.5 [What is this?]
4 [details]	12h 08m 48.61s182.20256°	+55° 58′ 03.7″55.96770°	6.3′′	Good	11.9′	8.5 ks	Matches SIMBAD source: SDSS J120848.54+555804.0, 0.7″ away.
Mean XRT rate: 3.18 (+1.05, -0.81) ×10^-3 ct s^-1 Peak XRT rate: 4.1 (+2.0, -1.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.8 (+2.9, -2.2) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 1.1 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.0 [What is this?]

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the 1SXPS documentation.
^* The position was enhanced using astrometry derived from the Swift UVOT.
^† The position was astrometrically corrected using the XRT sources and the 2MASS catalogue.

Image

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FITS image.

Exposure map

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FITS exposure map.